Provided are a video-previewing method, a video-previewing system and a computer program product. The video-previewing method is used for providing preview of a video to be played for an electronic device at least including a touch-sensitive display. The video-previewing method comprises the following steps of: detecting a resolution of the touch-sensitive display unit of the electronic device; and generating a preview screen corresponding to the video on the touch-sensitive display unit according to the resolution of the touch-sensitive display unit, wherein the preview screen includes M level frame bars and each of the M level frame bars displays N video frames, wherein the value of the frame number N of video frames for each of the M level frame bars is determined based on the resolution of the touch-sensitive display unit, where M>=1 and N>=1. The invention achieves the purposes of providing quickly previewing of a video, and quickly seeking or jumping to a special video frame of the video, obtaining the quickness and convenience in use.